Security getting lost when accessing EF6 over WCF

Firstly let me apologise as I don't believe it is a CSLA issue but an EF6 one.

I am using CSLA 4.5, EF6 and WCF with IIS Express in VS2012.

My problem is whenever I add a record in a dataportal_insert EF6 clears the user security so when the response goes back to the client the o:security section of the message is missing which can be seen using svctraceviewer.exe in all prior messages.

if I comment out the add and savechanges lines all works.

        public void Insert(ProductData productData)
        {
            using (var ctx = DbContextManager<DatabaseContext>.GetManager())
            {
                ctx.DbContext.Products.Add(new Product().InjectFrom(productData) as Product);
                ctx.DbContext.SaveChanges();
            }
        }

I had originally thought it was my web.config settings but after trying countless configs and getting the same results I am now at a loss.  It's Friday and I have spent the last 4 days trying to figure it out and am scared of facing this problem again come Monday.

Any guidance would severely be appreciated.